In: Mechanical Engineering
Rank the following from most isotropic to least isotropic.
Unidirectional Long Fiber
Random short
Fiber Randon long fiber (not woven)
Oriented short Fiber
Isotropic means material having same property in all Directions.
So it is clear Least isotropic(Anisotropic) is Unidirectional Long Fiber because having different property in different directions and most isotropic is Random Short Fiber. Then both Oriented short fiber and Random long fiber fall in between both category.
Then Sequence is in increasing order of isotropy Unidirectional long Fiber - Random Short - Random Long Fiber(not Woven) - Oriented Short fiber.